✨ feat: upgrade to Astro v5 with compatibility and improvements

- 🗂️ Migrated content collections to the new Content Layer API:
  - Removed deprecated `type: "content"` from content collections.
  - Updated `src/content/config.ts` to use the Content Layer API.
  - Validated content files and schema using `astro check`.

- 🛠️ Updated TypeScript configuration for Astro v5:
  - Added `.astro/types.d.ts` and `**/*` to the `include` property for better type inference.
  - Excluded `dist` directory from type-checking.

- ✅ Verified overall compatibility with Astro v5 and optimized for future updates.

package.json

@@ -12,13 +12,13 @@
   },
   "dependencies": {
     "@astrojs/check": "^0.9.4",
-    "@astrojs/mdx": "^3.1.9",
+    "@astrojs/mdx": "^4.0.1",
     "@astrojs/partytown": "^2.1.2",
-    "@astrojs/rss": "^4.0.9",
+    "@astrojs/rss": "^4.0.10",
     "@astrojs/sitemap": "^3.2.1",
-    "@astrojs/tailwind": "^5.1.2",
+    "@astrojs/tailwind": "^5.1.3",
     "@iconify-json/tabler": "^1.1.116",
-    "astro": "^4.16.12",
+    "astro": "^5.0.3",
     "astro-icon": "^1.1.0",
     "astro-pagefind": "^1.5.0",
     "dayjs": "^1.11.11",